Abstract:To investigate the effect of concentration of N 2 and CO 2 (0, 10, 20, 30, 40, and 50%) on the flame propagation characteristics of CH 4 /air premixed gases with stoichiometric ratios in variable cross-section ducts, experiments were conducted in four combinations of ducts at initial conditions of 298 K and 1 atm. The results show that the flame propagation velocity, propagation time, and overpressure are greater in the suddenly contracted duct than in the suddenly expanded duct if the dimensions of the duct… Show more
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